Ordering number : ENN6951

O1802RM (OT) No. 6951-1/17

Overview

The LA8522M is an I/O switching audio signal-processing
IC for use in facsimile units and telephones. It integrates a
crosspoint switch, a BTL power amplifier, an electronic
volume control, a microphone amplifier, and other
functions on a single chip.

Applications

Personal facsimile units and telephones

Functions

· Crosspoint switch (equivalent to an 4

4 switch)

· BTL power amplifier
· Electronic volume control
· Output level switching (ATT1: 0, 4, 8, 12 dB,

ATT2: 0, 6 dB)

· Serial interface

Features

· Built-in BTL power amplifier (8 to 32

load): V

5 V, R

= 16

, Pomax = 250 mW

· Built-in electronic volume (seven 4.0 dB steps)
· Two output level switching circuits (4 positions and 2

positions)

· Crosspoint switch that supports mixing

Package Dimensions

unit: mm

3112A-MFP24S

12.5

(0.75)

1.0

0.15

0.35

5.4

7.6

0.63

1.7max

1.5

0.1

SANYO: MFP24S

[LA8522M]

LA8522M

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Audio Signal-Processing IC with I/O Switching

Monolithic Linear IC

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

max

Allowable power dissipation

Pd max

70°C

550

(Mounted on a glass-epoxy board: 114.3

76.1

1.6 mm

)

Operating temperature

Topr

20 to +70

°C

Storage temperature

Tstg

40 to +150

°C

Specifications

Maximum Ratings

at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Recommended supply voltage

Allowable operating supply voltage range

CCop

4.5 to 6.0

Operating Conditions

at Ta = 25°C

No. 6951-2/17

LA8522M

Parameter

Symbol

Conditions

Ratings

Unit

min

typ

max

[Crosspoint switch]

Voltage gain

Gsw

Vin = 14 dBV

2.5

0.5

1.5

Maximum input level

Vimax

THD = 1.5 %

dBV

Output noise voltage

Nosw

20 to 20 kHz

µVrms

[AMP1]

Voltage gain

Vin = 43 dBV

28.2

29.2

30.2

Output total harmonic distortion

THD1

Vin = 43 dBV

0.15

1.5

Equivalent input noise voltage

Niamp1

Rg = 620

, 20 to 20 kHz

2.0

7.0

µVrms

[AMP2]

Voltage gain

Vin = 34 dBV

18.2

19.2

20.2

Output total harmonic distortion

THD2

Vin = 34 dBV

0.16

1.5

[AMP3]

Output level

Vin = 14 dBV, IN (7), OUT (22),

10.8

8.3

5.8

dBV

sw (101101) on

Output total harmonic distortion

THD3

Vin = 14 dBV, IN (7), OUT (22),

0.31

1.5

sw (101101) on

[AMP4]

Output level

Vin = 14 dBV, IN (8), OUT (21),

10.7

8.2

5.7

dBV

sw (110111) on

Output total harmonic distortion

THD4

Vin = 14 dBV, IN (8), OUT (21),

0.30

1.5

sw (110111) on

[AMP5]

Output level

Vin = 26 dBV, IN (7), OUT (23),

11.5

9.0

6.5

dBV

sw (010001) on

Output total harmonic distortion

THD5

Vin = 26 dBV, IN (7), OUT (23),

0.17

1.5

sw (010001) on

Maximum voltage gain

AMP1

G1max

AMP2

G2max

AMP3

G3max

AMP4

G4max

AMP5

G5max

Attenuator attenuation 1-1

Att1-1

Address (010101)

3.5

4.2

4.9

Attenuator attenuation 1-2

Att1-2

Address (011001)

7.5

8.2

8.9

Attenuator attenuation 1-3

Att1-3

Address (011101)

11.7

12.4

13.1

Attenuator attenuation 2-1

Att2-1

Address (000101)

5.5

6.2

6.9

Electronic volume control output level

evr

Vin = 42 dBV, IN (2), OUT (20),

14.3

12.2

10.3

dBV

sw (010001) on

Electronic volume control step size

Wevr

Vin = 42 dBV, IN (2), OUT (20),

3.1

4.0

4.9

sw (010010) on

Electronic volume control output noise voltage

evr

20 to 20 kHz, OUT (20)

µVrms

[BTL Power Amplifier]

Voltage gain

SPW

Vin = 20 dBV, R

= 16

18.1

19.6

21.1

Maximum voltage gain

VGp max

Total harmonic distortion

THDpw

Vin = 30 dBV, R

= 16

0.8

1.5

Maximum BTL output power

Po max

THD = 10 %, R

= 16

250

400

Ripple rejection ratio

SVRR

Rg = 620

, frin = 100 Hz, Vrin = 20 dBV,

= 16

Output noise voltage

VNOpw

Rg = 620

, 20 to 20 kHz, R

= 16

µVrms

[CPU Interface]

Clock frequency

Fck

500

kHz

Input signal high level

2.1

Input signal low level

1.0

REF

and Current Drain]

Internal reference voltage (the pin 10 voltage)

Vref

2.09

2.26

2.41

Quiescent current 1

Icco1

With the BTL power amplifier on and

12.5

the crosspoint switch off

Quiescent current 2

Icco2

With the BTL power amplifier off and

the crosspoint switch off

Electrical Characteristics

at Ta = 25°C, V

= 5 V, fin = 1 kHz, R

= 10 k

No. 6951-4/17

LA8522M

OUT

10k

15k

100k

SW1

1kHz

SW2

IN2

IN1

IN3

IN4

100k

620

3.3k

0.1

0.22

OUT1

OUT2

OUT3

OUT4

VREF

OP1-IN

OP1-NF

OP1-OUT

OP2-IN

OP3-IN

OP4-IN

GND

OP2-OUT

OP5-NT

SW-OUT1

SW-OUT2

SW-OUT3

SW-OUT4

BTL-IN

BTL-GND

BTL-OUT1

BTL-OUT2

BTL-VCC

VCC

T
op view

Data generator

LA8522M

BTL-VREF

0.033

620

100k

BTL-IN

BTL-OUT

10k

0.1

SW3

620

43k

10k

BTL-OUT

0.1

SW4

620

43k

0.33

0.1

620

0.1

100

A13728

Test Circuit Diagram

No. 6951-6/17

LA8522M

Pin Functions

Pin No.

Notes

Equivalent circuit

voltage (V)

Internal circuit reference voltage (about 2.25 V)
· Circuits other than the BTL amplifier operate

using this potential as a reference.

VREF

2.25

VCC

2.25V

A13743

Amplifier 1 noninverting input

Amplifier 1 inverting input

Amplifier 1 output

OP1-IN

OP1-NF

OP1-OUT

2.25

300

VCC

A13744

Amplifier 2 inverting input

Amplifier 2 output

OP2-IN

OP2-OUT

2.25

30k

300

VREF

VCC

A13745

Amplifier 3 input

Amplifier 4 input

OP3-IN

OP4-IN

2.25

30k

50k

VREF

VCC

A13746

Continued on next page.

No. 6951-7/17

LA8522M

Continued from preceding page.

Pin No.

Notes

Equivalent circuit

voltage (V)

Electronic volume control output
(Fourth SW output)

SW-OUT4

2.25

40k

VCC

A13750

300

To 19 pin

P-VCC

A13748

BTL power amplifier output 1

BTL power amplifier inverting input

BTL-OUT1

BTL-IN

0.44V

To 16 pin

50k

40k

20k

P-VCC

A13749

BTL power amplifier output 2

BTL power amplifier reference voltage

BTL-OUT2

BTL-VREF

0.44V

Continued on next page.

Chip enable input

Data input

Clock input

100k

VCC

A13747

Serial Data Format (6-bit structure)*

A6:0

Crosspoint switch (and other device) address setting (binary)

Controls the crosspoint switch and power amplifier on/off state.
Electronic volume control and attenuator selection

D = 1: Crosspoint switch: on
D = 0: Crosspoint switch: off

*1. When 8-bit serial data input mode is used.

Since the serial data has a 6-bit structure, the first and second bits are unused when 8-bit input mode is
used.

2. When the reset value is issued, the D data value can be either 0 or 1.

Notes 1. A reset command must be issued 200 ms after power is applied.

2. The electronic volume control is set to 0 dB by a reset (address: 00000*).
3. Attenuator 1 is set to 0 dB by a reset (address: 00000*).
4. Attenuator 2 is set to 0 dB by a reset (address: 00000*).

No. 6951-9/17

LA8522M

DATA

A13754

FIRST BIT

CLOCK

Address table (Crosspoint switch)

Input - Output

OUT1

OUT2

OUT3

OUT4

AMP1

10000

10100

11000

11100

AMP2

10001

10101

11001

11101

AMP3

10010

10110

11010

11110

AMP4

10011

10111

11011

11111

Address No.

A4:0

Mode

00000

Reset, control switch default

00011

BTL power amplifier: off

Default setting

00011

BTL power amplifier: on

01000

Electronic volume control

0 dB

Default setting

01001

Electronic volume control

4 dB

01010

Electronic volume control

8 dB

01011

Electronic volume control

12 dB

01100

Electronic volume control

16 dB

01101

Electronic volume control

20 dB

01110

Electronic volume control

24 dB

01111

Electronic volume control

28 dB

01000

Attenuator 1-0

0 dB

Default setting

01010

Attenuator 1-1

4 dB

01100

Attenuator 1-2

8 dB

01110

Attenuator 1-3

12 dB

00010

Attenuator 2-0

0 dB

Default setting

00010

Attenuator 2-1

6 dB

[Data A4:0]

Other addresses [Data A4:0, D]

Serial Data Timing

· fmax (Maximum clock frequency)

500 kHz

· t

(Low-level clock pulse width)

At least 1 µs

· t

(High-level clock pulse width) At least 1 µs

· t

(Chip enable setup time)

At least 1 µs

· t

(Chip enable hold time)

At least 1 µs

· t

(Data setup time)

At least 1 µs

· t

(Data hold time)

At least 1 µs

· t

(Chip enable pulse time)

At least 1 µs

Usage Notes

· Attenuator 1

Normally, attenuator 1 is set to 0 dB. It can be set to attenuate by -4, -8, or -12 dB by issuing serial data with a value of
010101, 011001, or 011101, respectively.

No. 6951-10/17

LA8522M

DATA

A13755

CLOCK

tCS

tCH tWC

tWH tWH

tDS tDH

fmax

A13756

ATT1

Crosspoint switch

ATT1-OUT

· Attenuator 2

Normally, attenuator 2 is set to 0 dB. It can be set to attenuate by -6 dB by issuing serial data with a value of 000101.

A13757

Crosspoint switch

ATT2

ATT2-OUT

· Power amplifier phase compensation capacitors (Values shown are examples for reference purposes.)

PWR-VREF

PWR-IN

PWR-GND

PWR-OUT1

PWR-OUT2

PWR-VCC

A13758

10k

100k

0.33

C1: 100 µF
C2: 0.1 µF
C3: 0.1 µF
C4: 0.1 µF
C5: 0.1 µF
C6: 100 µF
C7: 100 pF (The time constant will be under 10 µs.)
SP8: 8 to 32

· Voltage gain: 20 to 30 dB

Of the external components, the capacitors C2 and C3 are the power amplifier phase compensation capacitors. If these
capacitors are located away from the IC pin due to layout considerations, the impedance relationship will result in a
reduction in the phase compensation effect, and high band oscillator may occur.
Therefore, we recommend that the two capacitors C2 and C3 discussed above be located as close as possible to the IC
pins in the layout. However, if you find that, due to layout relationships, the circuit tends to oscillate, we recommend
that, rather than compensation using only capacitors, you use a phase compensation design with resistors (about 1 to
2.2

) inserted in series with the capacitors.

If the capacitor C7 is added to the feedback resistor path, the phase of the feedback path will be delayed and capacitors
C4 and C5 will be required. Here, the time constant of the feedback resistor and C7 must be 10 µs or less (100 k

100 pF).

· LA8522M ground line layout (See the figure on the following page.)

The LA8522M circuit blocks can be roughly classified as follows.
(1) Power amplifier system, (2) Crosspoint switch small-signal system

Since this block structure involves two significantly different circuit types, each block has independent VCC and
ground pins. It is best if external devices are connected to the ground line for the corresponding block, and that finally
the two block ground lines are connected to the power supply (regulator) ground, which is the final reference. In
particular, the PCB pattern should be formed with two ground lines.
There are cases, however, where a single line is used for the power supply ground due to limitations on protruding PCB
areas. In such cases, the ground line layout must be designed so that the sections of the ground line that carry large
currents (the power amplifier block) are closer to the power supply ground (and thus have a lower impedance) than the
sections of the ground line for circuits that draw smaller currents.
If the large currents drawn by the power amplifier pass through ground line that handles the lower currents from the
small-signal processing blocks, the signal path may be influenced by the ground, loops may be created, and low-band
oscillation may occur.
Therefore we recommend that the ground lines be designed as described above so that lines that carry larger amounts of
current are connected the closest to the power supply ground that serves as the reference.

· Inter-pin shorting

This IC may be damaged or destroyed if power is applied with any pins shorted together. Therefore, when mounting
this IC to a printed circuit board always check for pin shorting caused by stray solder or any other foreign material
before applying power.

· Load shorting

This IC may be damaged or destroyed if it is operated for extended periods with the load shorted. Do not allow the load
to be shorted.

· Maximum ratings

The slightest fluctuations in operating conditions may cause the ratings to be exceeded if this IC is operated in the
vicinity of the maximum ratings. Since this can lead to destruction of the device, applications must be designed with
adequate margins with respect to the power-supply voltage and other parameters so that the maximum ratings are never
exceeded.

No. 6951-11/17

LA8522M

No. 6951-13/17

LA8522M

RL=8

fIN=1kHz

=4.5V

=5V

=5.5V

VO20 -- VCC

RL=32

fIN=1kHz

VIN=100mVrms
fIN=100Hz
RL=16

19Pin:100

VIN=42V
Input to pin 2
(Amplifier 1 input)
Output from pin 20
fIN=1kHz
RL=10

VCC=5V
fIN=100Hz
19Pin:100

=4.5V

=5V

=5.5V

RL=16

fIN=1kHz

=4.5V

=5V

=5.5V

15Pin:BTL-OUT1

16Pin:BTL-OUT2

16Pin:OUT1

15Pin:OUT2

16Pin:OUT1

15Pin:OUT2

Rg=620

0.1

1.0

100

0.1

1.0

100

4.5

5.5

6.5

100

0.1

1.0

100

4.5

5.5

6.5

4.5

5.5

6.5

4.5

5.5

6.5

Output level, V

20 -- dBV

Step width -- dB

Output power, P

-- mW

Total harmonic distortion, THD -- %

Supply voltage, V

-- V

Input level -- dBV

Ripple rejection ratio, SVRR -- dB

Output noise, Output N

Vrms

BTL Amplifier Output Distortion Characteristics (1)

BTL Amplifier Output Distortion Characteristics (2)

Total harmonic distortion, THD -- %

Output power, P

-- mW

BTL Amplifier Output Distortion Characteristics (3)

Output power, P

-- mW

Total harmonic distortion, THD -- %

BTL Amplifier Output Noise V

Dependence

BTL Amplifier Ripple Rejection Ratio V

Dependence

Supply voltage, V

-- V

BTL Amplifier Ripple Rejection Ratio I/O Characteristics

Ripple rejection ratio, SVRR -- dB

Supply voltage, V

-- V

Supply voltage, V

-- V

Electronic Volume Control Step Width V

Dependence

No. 6951-14/17

LA8522M

4.5

5.5

6.5

4.5

5.5

6.5

4.5

5.5

6.5

130

120

110

100

4.5

5.5

6.5

4.5

5.5

6.5

4.5

5.5

6.5

4.5

5.5

6.5

100

VIN=26V
Input to pin 7
(Amplifier 3 input)
Output from pin 23
fIN=1kHz
RL=10

VIN=14V
Input to pin 8
(Amplifier 4 input)
Output from pin 22
fIN=1kHz
RL=10

ATT1-1

ATT1-2

ATT1-3

VIN=26V
Input to pin 7

Rg=620

(Amplifier 3 input)
Output from pin 23
fIN=1kHz
RL=10

ATT2-1

PWR-AMP:OFF

VOUT:4Pin (AMP1)

VOUT:6Pin (AMP2)

VOUT:23Pin

VOUT:20Pin

VOUT:22Pin

VOUT:21Pin

PWR-AMP:ON

VCC=5V
fIN=1kHz
with:1k-BPF

OP2-IN/OUT1, SW:OFF

OP3-IN/OUT2, SW:OFF

OP1-IN/OUT1, SW:OFF

OP2-IN/OUT3, SW:OFF

OP3-IN/OUT1, SW:OFF

OP1-IN/OUT4, SW:OFF

OP3-IN/OUT2, SW:111101

VO23 -- VCC

VO22 -- VCC

VNI -- VCC

VNO -- VCC

VIN=14V
Input to pin 8
(Amplifier 4 input)
Output from pin 22
fIN=1kHz
RL=10

Equivalent input noise voltage, V

Vrms

Output noise voltage, V

Vrms

Supply voltage, V

-- V

Output level, V

23 -- dBV

Supply voltage, V

-- V

Input level -- dBV

No signal current drain, I

CCO

-- mA

Attenuation, ATT -- dB

Attenuator 1 Attenuation V

Dependence

Attenuation, ATT -- dB

Supply voltage, V

-- V

Supply voltage, V

-- V

Output level, V

22 -- dBV

Attenuator 2 Attenuation V

Dependence

No Signal Current Drain V

Dependence

Supply voltage, V

-- V

Crosstalk I/O Characteristics

Crosstalk level, CT -- dBV

Supply voltage, V

-- V

Supply voltage, V

-- V

No. 6951-15/17

LA8522M

0.1

1.0

100

3.5

4.5

VCC=5V
fIN=1kHz
RL=16

TEMP:+70

TEMP:20

TEMP:+25

VCC=5V
Rg=620

BTL-OUT1:16Pin

BTL-OUT2:15Pin

STEP1, STEP

STEP4, STEP

STEP2, STEP

VIN=42dBV
Input to pin 2
(Amplifier 1 input)
Output from pin 20
fIN=1kHz
RL=10k

VIN=44dBV
Input to pin 5
(Amplifier 2 input)
Output from pin 23
fIN=1kHz
RL=10k

VIN=32dBV
Input to pin 5
(Amplifier 2 input)
Output from pin 22
fIN=1kHz
RL=10k

VIN=44dBV
Input to pin 5
(Amplifier 2 input)
Output from pin 23

fIN=1kHz
RL=10k

ATT1-1

ATT1-2

ATT2-1

ATT1-3

VO20 -- Ta

VO23 -- Ta

VO22 -- Ta

Output level, V

22 -- dBV

Attenuation, ATT -- dB

Output power, P

-- mV

Total harmonic distortion, THD -- %

Ambient temperature, Ta -- °C

Output level, V

23 -- dBV

Step width -- dB

Output noise voltage, V

Vrms

Ambient temperature, Ta -- °C

Output level, V

20 -- dBV

Electronic Volume Control Step Width Temperature Dependence

Attenuator Attenuation Temperature Dependence

Attenuation, ATT -- dB

BTL Amplifier Output Distortion Characteristics (4)

Output Amplifier Output Noise Temperature Dependence

Ambient temperature, Ta -- °C

Attenuator Attenuation Temperature Dependence

No. 6951-16/17

LA8522M

0.01

0.1

1.0

100

0.1

1.0

100

0.1

1.0

100

0.1

100

0.1

100

1000

0.1

1.0

100

0.1

1.0

100

0.01

0.1

1.0

100

THD -- VO20

THD -- VO22

VNI -- Ta

VNO -- Ta

THD -- VO23

THD -- VO21

VCC=5V
fIN=1kHz
Input to pin 2
Output from pin 4

fIN=1kHz
Input to pin 5
(Amplifier 2 input)
Output from pin 20

fIN=1kHz
Input to pin 5
(Amplifier 2 input)
Output from pin 22

fIN=1kHz
Input to pin 5
(Amplifier 2 input)
Output from pin 23

fIN=1kHz
Input to pin 5
(Amplifier 2 input)
Output from pin 20

VCC=5V
fIN=1kHz
Input to pin 5
Output from pin 6

TEMP:+70

TEMP:20

TEMP:+25

TEMP:20

TEMP:+25

TEMP:20

TEMP:+25

VCC=5V
Rg=620

AMP1

OUT1

OUT4

OUT2

OUT3

AMP2

Equivalent input noise voltage, V

Vrms

Output noise voltage, V

Vrms

Input level -- dBV

Total harmonic distortion, THD -- %

Output level, V

21 -- dBV

Total harmonic distortion, THD -- %

Input level -- dBV

Output level, V

20 -- dBV

Total harmonic distortion, THD -- %

Amplifier 1 I/O Characteristics

Amplifier 2 I/O Characteristics

Output level, V

22 -- dBV

Ambient temperature, Ta -- °C

Output level, V

23 -- dBV

PS No. 6951-17/17

LA8522M

This catalog provides information as of October, 2002. Specifications and information herein are subject
to change without notice.

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LA8522M

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LA8522M